FZ Retainer Bearing

FZ Retainer Bearing FZH (aluminum base) and FZP (resin base) steel balls are kept solid, and copper alloy, hard aluminum alloy and POM resin are respectively used as the matrix, and on the outer circular surface thereof, the orderly, Appropriate size, the shape of the special hole in the hole in the rolling bearing steel ball.

Introduction

FZH (aluminum base) and FZP (resin base) steel balls are kept solid, and copper alloy, hard aluminum alloy and POM resin are respectively used as the matrix, and on the outer circular surface thereof, the orderly, Appropriate size, the shape of the special hole in the hole in the rolling bearing steel ball. The use of the latest trench circumference lock ball technology, effectively solve the traditional locking ball and indentation can not completely prevent the lock ball ball off the problem. Hole bottom processing 90 ° to stop the ball so that the ball in the hole free rotation without falling off. Since the diameter of the steel ball is greater than the wall thickness of the retaining ring, the ball is used in contact with the matching hole and the shaft, so that the substrate (holding ring) floating in the middle, and the matching Hole and shaft radius difference is less than the diameter of the ball, that is, with the ball with the interference fit, with high precision, axis and hole relative movement flexibility. Is to maintain the replacement cycle of the product.

Applications

Engineering machinery: chassis travel agencies bearing wheels, towing wheel sleeve, tension wheel hub;
Automotive industry: balance shaft bushings, steel pin bushings, steering shaft main Shaw sleeve, connecting rod sleeve, valve rocker sleeve, camshaft sleeve, differential bushings, gearbox bushings, internal combustion engine main bearing , Thrust washers;
As well as the side of the piston pump, gear pump side pieces.

Advantages And Uses

The traditional relative movement of the hole and the shaft is a certain gap, and hole and the axis of movement between the friction coefficient, the use of ball retaining ring, the shaft and the hole is not in direct contact, but by the middle of the trace of interference Ball, and thus high precision, rolling friction instead of dynamic friction, rolling flexibility, the friction coefficient is small, long service life, both in the rotation, there are occasions to move, with oil-free or filling the shaft and axis, But the movement accuracy is low, with rolling bearings, can only meet the relative rotation of the shaft, and the ball to keep the ring, the above two conditions are met, has been widely used in cold die rolling mold, high precision machine tools, Machine tool accessories and require high-precision axial or axial radial movement at the same time.

Requirements For Mating Parts

1. Bushings: Material GCrl5, YB9, heat treatment, hardness HRC62 ~ 66, technical conditions by the GB / T12446 with the axis should have a radial interference between 0.01-0.02.
2. Shaft: Material GCrl5, YB9, heat treatment, hardness HRC62 ~ 66, technical conditions by GB / T12446, shaft tolerance using h5.
3. Measurement: With the general measurement methods (pneumatic measuring instrument, the outer diameter of the micrometer, diameter dial gauge, etc.) measuring the size of the shaft guide sleeve and ball bias value, you can find the interference with the amount, that is Ymax = dmax + 2d'-DmIn, the required interference is 0.01-0.02mm ².